Foot-Pound/Second to BTU/Hour Converter

Power Converter

22 units available

Decimals:

From

To

4.626243

1 ft·lbf/s = 4.626243 BTU/h

Formula:

BTU/h = ft·lbf/s × 4.6262428683

With your value: 1 ft·lbf/s = 4.62624287 BTU/h

How big is that?

Everyday references on a logarithmic scale, all expressed in foot-pound/second so you can sanity-check the result.

Your value1.00 ft·lbf/s

LED bulb (6.6× your value)6.64 ft·lbf/s

Laptop (48× your value)47.9 ft·lbf/s

Microwave oven (7.4e+2× your value)738 ft·lbf/s

Electric kettle (2.2e+3× your value)2.21e+3 ft·lbf/s

Family car engine (6.6e+4× your value)6.64e+4 ft·lbf/s

Other Foot-Pound/Second to BTU/Hour conversions

2 ft·lbf/s to BTU/h 3 ft·lbf/s to BTU/h 4 ft·lbf/s to BTU/h 5 ft·lbf/s to BTU/h 6 ft·lbf/s to BTU/h 7 ft·lbf/s to BTU/h 8 ft·lbf/s to BTU/h

Foot-Pound/Second to BTU/Hour Conversion Table

Foot-Pound/Second (ft·lbf/s)	BTU/Hour (BTU/h)
0.5	2.313121
1	4.626243
2	9.252486
5	23.131214
10	46.262429
15	69.393643
20	92.524857
25	115.656072
50	231.312143
100	462.624287
250	1,156.560717
500	2,313.121434
1000	4,626.242868

BTU/Hour to Foot-Pound/Second Conversion Table

BTU/Hour (BTU/h)	Foot-Pound/Second (ft·lbf/s)
0.5	0.108079
1	0.216158
2	0.432316
5	1.080791
10	2.161581
15	3.242372
20	4.323163
25	5.403953
50	10.807906
100	21.615813
250	54.039532
500	108.079064
1000	216.158128

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Foot-Pound/Second (ft·lbf/s)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

BTU/Hour (BTU/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Foot-Pound/Second to BTU/Hour

To convert from Foot-Pound/Second (ft·lbf/s) to BTU/Hour (BTU/h), multiply the value by 4.6262428683.

Formula: BTU/h = ft·lbf/s × 4.6262428683

Reverse: ft·lbf/s = BTU/h × 0.2161581284

Step-by-Step Example

Start with your value in Foot-Pound/Second. For example: 5 ft·lbf/s
Multiply by the conversion factor: 5 x 4.6262428683
The result is: 23.131214 BTU/h

About Foot-Pound/Second

The foot-pound/second (ft·lbf/s) is a unit of power. One foot-pound/second equals 1.355817948 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

About BTU/Hour

The btu/hour (BTU/h) is a unit of power. One btu/hour equals 0.2930710702 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

Frequently Asked Questions

How many BTU/Hour are in 1 Foot-Pound/Second?

There are exactly 4.6262428683 BTU/Hour in 1 Foot-Pound/Second. This means the conversion factor from Foot-Pound/Second to BTU/Hour is 4.6262428683.

What is the formula to convert Foot-Pound/Second to BTU/Hour?

The formula to convert Foot-Pound/Second to BTU/Hour is: BTU/h = ft·lbf/s × 4.6262428683. For example, to convert 10 Foot-Pound/Second to BTU/Hour, you would multiply 10 by 4.6262428683.

What is a Foot-Pound/Second?